Japan Geoscience Union Meeting 2014

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Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-CC Cryospheric Sciences & Cold District Environment

[A-CC32_29PM1] Past environmental changes through ice core studies

Tue. Apr 29, 2014 2:15 PM - 4:00 PM 419 (4F)

Convener:*Kenji Kawamura(National Institute of Polar Research, Research Organization of Information and Systems), Minoru Ikehara(Center for Advanced Marine Core Research, Kochi University), Nozomu Takeuchi(Chiba University), Ayako Abe-Ouchi(Atmosphere and Ocean Research Institute, The University of Tokyo), Takuro Kobashi(National Institute of Polar Research), Chair:Nozomu Takeuchi(Chiba University), Kenji Kawamura(National Institute of Polar Research, Research Organization of Information and Systems), Takuro Kobashi(National Institute of Polar Research)

2:45 PM - 3:00 PM

[ACC32-03] Greenland temperature variability over the past 2000 years inferred from NGRIP and GISP2 ice cores

*Takuro KOBASHI1, Kumiko GOTO-AZUMA1, Kenji KAWAMURA1, Bo VINTHER2, Thomas BLUNIER2, Jason BOX3, Christo BUIZERT4, Atsuhiro MUTO5, James WHITE6 (1.National Institute of Polar Reseaerch, 2.Copenhagen University, 3.Geological Survey of Denmark and Greenland, 4.Oregon State University, 5.Pennsylvania state University, 6.University of Colorado at Boulder)

Keywords:Greenland, temperature, ice core, GISP2, NGRIP, 2000 years

We reconstructed Greenland temperature change for the past 2000 years using argon and nitrogen isotopes in trapped air in NGRIP and GISP2 ice cores. To identify true variability of temperature, we also applied various methods such as borehole temperature inversion, Monte Carlo inversion of borehole temperature, oxygen isotopes of ice, forward and inverse methods for argon and nitrogen isotopes with borehole temperatures. We will present the results of analyses and implications.